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Classification/Taxonomy. Chapter 17. The Three-Domain System. There are 3 Domains: Domain Bacteria Domain Archaea Domain Eukarya There are 6 Kingdoms: 1. Eubacteria 2. Archaebacteria 3. Protista 4. Fungi 5. Plantae 6. Animalia.
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Classification/Taxonomy Chapter 17
The Three-Domain System • There are 3 Domains: • Domain Bacteria • Domain Archaea • Domain Eukarya • There are 6 Kingdoms: 1. Eubacteria 2. Archaebacteria 3. Protista 4. Fungi 5. Plantae 6. Animalia
The Three-Domain System • There are 3 Domains: • Domain Bacteria • Kingdom Eubacteria • Unicellular/Prokaryotes • Cell walls have Peptidoglycan • Domain Archaea • Kingdom Archaebacteria • Unicellular/Prokaryotes • Cell walls withOUTPeptidoglycan • Domain Eukarya • Kingdoms Protista, Fungi, Plantae, Animalia
Domain Bacteria Kingdom Eubacteria • Unicellular Prokaryote • Cell walls with Peptidoglycan • All other bacteria you encounter everyday E. coli Staphlycoccus Streptococcus
Domain Archaea Kingdom Archaebacteria • Unicellular Prokaryote • Cell walls withOUT Peptidoglycan • Extremophiles – Love extreme environments like volcanoes, hydrothermal vents, and hot springs Archaea Hydrothermal Vent Hot Spring Volcano
Domain Eukarya Kingdom Protista Video Clip: Amoeba • Unicellular or Multicellular • Live in colonies Amoeba Euglena Paramecium
3 Categories of Protista • Plant-like • Example: Algae • Perform photosynthesis (autotrophs) • Animal-like • Example: Amoeba • Can cause disease (malaria, sleeping sickness) • Fungus-like • Example: Slime molds
Plant-like Protists • Algae • Photosynthetic (autotrophic) • Euglena • Live in shallow water • Photosynthetic (autotrophic) • Can also be heterotrophic when light not available • Absorb nutrients • Ingest other organisms
Animal-like Protists • Also called Protozoans • 4 Types • Ciliates (Example: Paramecium) • Sarcodina (Example: Amoeba) Amoebas move by pseudopods (“false feet” formed by streaming cytoplasm) • Zooflagellates • Sporozoans
Fungi-like Protists Slime Mold
Domain Eukarya Kingdom Fungi • Unicellular or Multicellular • Cell walls made of Chitin • Heterotrophs….they eat! Yeast Mushrooms
Domain Eukarya Kingdom Fungi • Can reproduce sexually & asexually • Usually reproduce asexually • Yeast reproduce asexually by budding • However, under unfavorable conditions (such as drought) fungi reproduce sexually
Kingdom Fungi • Hyphae • Thread-like structures which form all parts of the fungus • Main function is to help fungus obtain food – provide large surface area for absorption of nutrients
Domain Eukarya Kingdom Plantae • Multicellular • Cell walls made of Cellulose • Autotrophs….make their own food Trees & Grass Moss Venus Fly Trap
Domain Eukarya Kingdom Animalia • Multicellular • NO cell walls • Heterotrophs….they eat Worms Insects Jellyfish Giraffes
6 Kingdoms Prokaryote Prokaryote Eukaryote Eukaryote Eukaryote Eukaryote EubacteriaArchaebacteriaProtista Fungi PlantaeAnimalia Unicellular, Multicellular, Colonial Unicellular (Yeast), Multicellular Unicellular Unicellular Multicellular Multicellular Peptidoglycan NoPeptidoglycan Chitin Cellulose No Cell Wall Autotroph or heterotroph Autotroph or heterotroph Autotroph or heterotroph Heterotroph Autotroph Heterotroph Release enzymes to digest food Includes Algae “Junk Drawer" “Ancient Bacteria” Includes humans Most common bacteria Chloroplasts Live in very hot places E. ecoli Pyrococcus furiosus Paramecium H. coccinea Fern Homo sapiens